Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Qual é o número total de apelidos para o Southwestern College?
 ###Tabelas: CREATE TABLE current_members (current_members_id AUTO_INCREMENT PRIMARY KEY, Institution VARCHAR, Location VARCHAR, Founded INT, Type VARCHAR, Enrollment INT, Nickname VARCHAR, Joined VARCHAR) CREATE TABLE alpg_tour_6 (alpg_tour_6_id AUTO_INCREMENT PRIMARY KEY, No. INT, Date VARCHAR, Tournament VARCHAR, Winning score VARCHAR, To par VARCHAR, Margin of victory VARCHAR, Runner(s)-up VARCHAR) CREATE TABLE singles:_26_18–8 (singles:_26_18–8_id AUTO_INCREMENT PRIMARY KEY, Outcome VARCHAR, Date VARCHAR, Tournament VARCHAR, Surface VARCHAR, Opponent VARCHAR, Score VARCHAR) CREATE TABLE s–e_voting_system_result (s–e_voting_system_result_id AUTO_INCREMENT PRIMARY KEY, Eviction No. INT, Nominee VARCHAR, Vote to Save VARCHAR, Vote to Evict VARCHAR, Net vote VARCHAR, Eviction result VARCHAR) CREATE TABLE orthologs (orthologs_id AUTO_INCREMENT PRIMARY KEY, Common Name VARCHAR, Genus & Species VARCHAR, NCBI Accession Number VARCHAR, Length (AA) INT, % Identity to C7orf38 INT, % Similarity to C7orf38 INT)  
SELECT COUNT Nickname FROM current_members WHERE Institution = Southwestern College